caa a22 4500 477139485 CHVBK 20180405111728.0 cr unu---uuuuu 170330e19970801xx s 000 0 eng 10.1007/BF02767785 doi (NATIONALLICENCE)springer-10.1007/BF02767785 Graphical method for the determination of the complex NMR shift and equilibrium constant for a hetero-association accompanying self-associations [Elektronische Daten] [Chi-Chyuang Lin, Cheng-Yu Fang, Dah-Yu Kao, Jenn-Shing Chen] We describe a novel graphical method which, in conjunction with the previously proposed graphical determination of monomer shift, dimer shift, and dimerization constant for self-association, allows us to determine the complex shift and equilibrium constant for a hetero-association, A + B ⇌ AB, accompanying self-associations, A + A ⇌ A2, and B + B ⇌ B2. The merit of the new method includes the removal of the restrictions imposed on the conventional Benesi-Hildebrand (B-H) plot: (1) that the concentration of one component must be much less than that of the other; (2) that there be no accompanying self-association. The simultaneous equilibrium of the self-association of 2-pyrrolidone (A) and that of 4-methyl-α-pyrrolidone (B) and the hetero-association between A and B in acetonitrile-d3 at 25‡C is studied. The inappropriateness of the B-H plot in dealing with this case is also pointed out. Plenum Publishing Corporation, 1997 Self-association nationallicence hetero-association nationallicence NMR shift nationallicence graphical method nationallicence Lin Chi-Chyuang Department of Applied Chemistry, National Chiao Tung University, 30050, Hsin Chu, Taiwan aut Fang Cheng-Yu Department of Applied Chemistry, National Chiao Tung University, 30050, Hsin Chu, Taiwan aut Kao Dah-Yu Department of Applied Chemistry, National Chiao Tung University, 30050, Hsin Chu, Taiwan aut Chen Jenn-Shing Department of Applied Chemistry, National Chiao Tung University, 30050, Hsin Chu, Taiwan aut Journal of Solution Chemistry Springer US 26/8(1997-08-01), 817-832 0095-9782 26:8<817 1997 26 10953 https://doi.org/10.1007/BF02767785 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02767785 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lin Chi-Chyuang Department of Applied Chemistry, National Chiao Tung University, 30050, Hsin Chu, Taiwan aut NATIONALLICENCE 700 1- Fang Cheng-Yu Department of Applied Chemistry, National Chiao Tung University, 30050, Hsin Chu, Taiwan aut NATIONALLICENCE 700 1- Kao Dah-Yu Department of Applied Chemistry, National Chiao Tung University, 30050, Hsin Chu, Taiwan aut NATIONALLICENCE 700 1- Chen Jenn-Shing Department of Applied Chemistry, National Chiao Tung University, 30050, Hsin Chu, Taiwan aut NATIONALLICENCE 773 0- Journal of Solution Chemistry Springer US 26/8(1997-08-01), 817-832 0095-9782 26:8<817 1997 26 10953 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer